Overview The Audi A4 B8, produced between 2008 and 2016, represents the third generation of the A4 series. Among the range of engines offered, the CDN engine is a 2.0-liter TDI (Turbocharged Direct Injection) diesel powerplant known for its balance of efficiency, performance, and reliability. This engine is part of the EA189 family of diesel engines, which was widely used …